Basic Stoichiometry

What is the molar mass of C₆H₁₂O₆?

• 180.18
• 180.12
• 180.24
• 180.06

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

How many moles are in 98.3 g of Al(OH)₃?

• 2.14 mol
• 1.26 mol
• 6.63 mol
• 5.9 mol

Tags

NGSS.HS-PS1-7

How many grams is 1.2 moles of Neon?

• 0.05 grams
• 16.6 grams
• 21.2 grams
• 24 grams

Using the balanced equation below,
Mg(s)   +  2HCl(aq)  -->   MgCl₂(aq)   + H₂(g)
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?

• 3.8 moles
• 15 moles
• 7.5 moles
• 23 moles

Tags

NGSS.HS-PS1-7

Using the balanced equation below,
 CaC₂(s)   +  2H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)
how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂?

• 119 g
• 21.2 g
• 114 g
• 237 g

Tags

NGSS.HS-PS1-7

Given the following reaction  2NaClO₃ (s) --> 2NaCl (s) + 3O₂ (g). How many grams of NaCl are produced when 80.0 grams of O₂ are produced?

• 500 g Nacl
• 96.7 g NaCl
• 6960 g of NaCl

Tags

NGSS.HS-PS1-7

Using the following equation:
4NH₃(g) + 5O₂(g) --> 4NO(g) + 6H₂O(l)
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia?

• 45.08 g O₂
• 133.33 g O₂
• 260.77 g O₂
• 75.92 g O₂

If 138.6 g of KClO₃ is heated and decomposes completely, how many liters of oxygen gas is produced at STP?  
2KClO₃ (s) -->2 KCl (s) +3 O₂ (g)

•  54.29 L O₂ produced
• 1.696 L O₂ produced
• 9.694 L O₂ produced
• 38.00 L O₂ produced

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

NGSS.HS-PS1-7